CN104991246A - Radar range finding method eliminating critical jitter - Google Patents
Radar range finding method eliminating critical jitter Download PDFInfo
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- CN104991246A CN104991246A CN201510460109.8A CN201510460109A CN104991246A CN 104991246 A CN104991246 A CN 104991246A CN 201510460109 A CN201510460109 A CN 201510460109A CN 104991246 A CN104991246 A CN 104991246A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008030 elimination Effects 0.000 claims 4
- 238000003379 elimination reaction Methods 0.000 claims 4
- 230000004888 barrier function Effects 0.000 description 6
- 230000000739 chaotic effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a radar range finding method eliminating critical jitter. The method comprises the following steps of (1) receiving radar distance information by a controller; (2) comparing an increased distance L1 between normal distance information receiving and displaying and a critical distance value D; (3) alarming and displaying the value of the increased distance L1 itself if the increased distance L1 is beyond the range [D-5, D+5]; and (4) referring to the distance value L0 in a previous period if the increased distance L1 is right in the [D-5, D+5] value range. In the step 4, if the increased distance L1 is larger than the previous-period distance value L0+5, alarm signals are emitted according to the D-5 value. If the increased distance L1 is smaller than the previous-period distance value L0-5, alarm signals are then emitted according to the D+5 value. When the increased distance L1 is in the [L0-5, L0+5], alarm signals are emitted according to the value of the increased distance L1 itself.
Description
Technical field
The present invention relates to the parking assisting system based on ultrasonic radar, be specifically related to a kind of radar range finding method eliminating critical flutter.
Background technology
Ultrasonic radar is subject to temperature, the impact of humidity causes range finding not accurate enough, and the barrier of same distance is different in the distance values in ultrasonic radar different range finding cycle; If the distance critical value just having a barrier to be in software to judge, just there will be alarm sound and cut in and out or the situation of frequency confusion modified tone, simultaneously warning message be presented at saltus step between different numerical value; The general parking assisting system based on ultrasonic radar represents the distance of barrier by the different and corresponding display strategy of the frequency of buzzer warning, the saltus step of the confusion of frequency and modified tone and display easily causes the misunderstanding of client.Common ultrasonic radar distance-finding method easily appears at the phenomenon of some critical distance upper frequency confusion modified tone and display saltus step, is called critical flutter.
Summary of the invention
For the problems referred to above, patent describes a kind of radar range finding method being eliminated critical flutter by software, and define corresponding principle of work and control strategy.By increasing the strategy that judges critical distance on original distance-finding method, the chaotic state with showing saltus step of frequency that radar system occurs when judging critical distance just can be eliminated; Thus add the comfortableness that the stability of system and client use.
To achieve these goals, the technical scheme that the present invention takes is: a kind of radar range finding method eliminating critical flutter, and the method comprises the following steps: step one, controller receiving radar range information; Step 2, between normal receiving range information and display, increase the contrast of distance L1 and critical distance numerical value D; Step 3, when increase distance L1 be not in [D-5, D+5] numerical intervals time, carry out reporting to the police and showing according to increasing distance L1 numerical value itself; Step 4, when increase distance L1 be just in [D-5, D+5] numerical intervals time, then need to contrast cycle distance values L0.In described step 4, if increase cycle distance values L0+5 on distance L1>, report to the police according to D-5 numerical value; Increase cycle distance values L0-5 on distance L1<, report to the police according to D+5 numerical value.When described increase distance L1 is in interval [L0-5, L0+5], report to the police according to increase distance L1 numerical value itself.The method is realized by radar ranging system, and described radar ranging system comprises the radar receiving element, control module and the alarm unit that connect successively.The unit of described control comprises critical distance numerical value contrast unit, distance values contrast of upper cycle unit, described critical distance numerical value contrast unit is for increasing the contrast of distance L1 and critical distance numerical value D, and described distance values contrast of upper cycle unit is for increasing the contrast of distance L1 and upper cycle distance values L0.
Beneficial effect of the present invention is: the chaotic state with showing saltus step of frequency that the present invention occurs when judging critical distance by eliminating radar system; Thus add the comfortableness that the stability of system and client use, only need increase this strategy in software, without the need to increasing cost; This patent is easy to use, implements difficulty little, is convenient to promote; This patent reliable design, the life-span is long, can Reusability.
Accompanying drawing explanation
Below the content expressed by this Figure of description and the mark in figure are briefly described:
Fig. 1 is the process flow diagram of the specific embodiment of the present invention;
Embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is as the effect of the mutual alignment between the shape of involved each component, structure, each several part and annexation, each several part and principle of work, manufacturing process and operation using method etc., be described in further detail, have more complete, accurate and deep understanding to help those skilled in the art to inventive concept of the present invention, technical scheme.
Eliminate a radar range finding method for critical flutter, the method comprises the following steps: step one, controller receiving radar range information; Step 2, between normal receiving range information and display, increase the contrast of distance L1 and critical distance numerical value D; Step 3, when increase distance L1 be not in [D-5, D+5] numerical intervals time, carry out reporting to the police and showing according to increasing distance L1 numerical value itself; Step 4, when increase distance L1 be just in [D-5, D+5] numerical intervals time, then need to contrast cycle distance values L0.In described step 4, if increase cycle distance values L0+5 on distance L1>, report to the police according to D-5 numerical value; Increase cycle distance values L0-5 on distance L1<, report to the police according to D+5 numerical value.When described increase distance L1 is in interval [L0-5, L0+5], report to the police according to increase distance L1 numerical value itself.The method is realized by radar ranging system, and described radar ranging system comprises the radar receiving element, control module and the alarm unit that connect successively.The unit of described control comprises critical distance numerical value contrast unit, distance values contrast of upper cycle unit, described critical distance numerical value contrast unit is for increasing the contrast of distance L1 and critical distance numerical value D, and described distance values contrast of upper cycle unit is for increasing the contrast of distance L1 and upper cycle distance values L0.
As shown in Figure 1, this system increases the contrast of distance L1 and critical distance numerical value D between normal receiving range information and display, when L1 is not in [D-5, D+5] numerical intervals, carries out reporting to the police and showing according to L1 numerical value itself; When L1 is in [D-5, D+5] numerical intervals just, then need to contrast cycle distance values L0.L1>L0+5, illustrates that barrier is moving closer to rear view of vehicle, now, reports to the police according to D-5 numerical value; L1<L0-5, then show that barrier is gradually away from rear view of vehicle, now, reports to the police according to D+5 numerical value; When L1 is in interval [L0-5, L0+5], shows that barrier moving range is little, be substantially in static, now itself report to the police according to L1 numerical value.By increasing the strategy that judges critical distance on original distance-finding method, the chaotic state with showing saltus step of frequency that radar system occurs when judging critical distance just can be eliminated; Thus add the comfortableness that the stability of system and client use.
Above by reference to the accompanying drawings to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasion, all within protection scope of the present invention without to improve.The protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (5)
1. eliminate a radar range finding method for critical flutter, it is characterized in that, the method comprises the following steps:
Step one, controller receiving radar range information;
Step 2, between normal receiving range information and display, increase the contrast of distance L1 and critical distance numerical value D;
Step 3, when increase distance L1 be not in [D-5, D+5] numerical intervals time, carry out reporting to the police and showing according to increasing distance L1 numerical value itself;
Step 4, when increase distance L1 be just in [D-5, D+5] numerical intervals time, then need to contrast cycle distance values L0.
2. the radar range finding method of elimination critical flutter according to claim 1, is characterized in that, in described step 4, if increase cycle distance values L0+5 on distance L1>, reports to the police according to D-5 numerical value; Increase cycle distance values L0-5 on distance L1<, report to the police according to D+5 numerical value.
3. the radar range finding method of elimination critical flutter according to claim 2, is characterized in that, when described increase distance L1 is in interval [L0-5, L0+5], reports to the police according to increase distance L1 numerical value itself.
4. the radar range finding method of elimination critical flutter according to claim 2, it is characterized in that, the method is realized by radar ranging system, and described radar ranging system comprises the radar receiving element, control module and the alarm unit that connect successively.
5. the radar range finding method of elimination critical flutter according to claim 2, it is characterized in that, the unit of described control comprises critical distance numerical value contrast unit, distance values contrast of upper cycle unit, described critical distance numerical value contrast unit is for increasing the contrast of distance L1 and critical distance numerical value D, and described distance values contrast of upper cycle unit is for increasing the contrast of distance L1 and upper cycle distance values L0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510460109.8A CN104991246B (en) | 2015-07-29 | 2015-07-29 | A kind of radar range finding method for eliminating critical flutter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510460109.8A CN104991246B (en) | 2015-07-29 | 2015-07-29 | A kind of radar range finding method for eliminating critical flutter |
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| Publication Number | Publication Date |
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| CN104991246A true CN104991246A (en) | 2015-10-21 |
| CN104991246B CN104991246B (en) | 2017-11-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1256815A2 (en) * | 2001-05-09 | 2002-11-13 | Valeo Schalter und Sensoren GmbH | Distance warning device for motor vehicles and operating method |
| CN100999215A (en) * | 2006-12-20 | 2007-07-18 | 东风汽车有限公司 | Vehicle alarm system |
| CN101011967A (en) * | 2006-12-22 | 2007-08-08 | 东风汽车有限公司 | Parking warning system and motor vehicle using same |
| US20120013485A1 (en) * | 2010-06-24 | 2012-01-19 | Christian Pampus | Method for warning a driver of a collision |
| CN103802722A (en) * | 2012-11-14 | 2014-05-21 | 上海工程技术大学 | Intelligent automobile backing image and ultrasonic ranging system |
-
2015
- 2015-07-29 CN CN201510460109.8A patent/CN104991246B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1256815A2 (en) * | 2001-05-09 | 2002-11-13 | Valeo Schalter und Sensoren GmbH | Distance warning device for motor vehicles and operating method |
| CN100999215A (en) * | 2006-12-20 | 2007-07-18 | 东风汽车有限公司 | Vehicle alarm system |
| CN101011967A (en) * | 2006-12-22 | 2007-08-08 | 东风汽车有限公司 | Parking warning system and motor vehicle using same |
| US20120013485A1 (en) * | 2010-06-24 | 2012-01-19 | Christian Pampus | Method for warning a driver of a collision |
| CN103802722A (en) * | 2012-11-14 | 2014-05-21 | 上海工程技术大学 | Intelligent automobile backing image and ultrasonic ranging system |
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| Publication number | Publication date |
|---|---|
| CN104991246B (en) | 2017-11-14 |
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